The increased fluidity and reduction in motion blur are undeniable when compared to a 60 Hz display. Even so, we'd be lying if we said we could definitively recognize a 240 Hz panel from a 144 Hz panel.
https://www.notebookcheck.net/In-review-Razer-Blade-15-and-Gigabyte-Aero-15-are-using-the-same-240-Hz-panels-from-Sharp.420797.0.html